// + operator on boolean type
var BOOLEAN: boolean;

function foo(): boolean { return true; }

class A {
    public a: boolean;
    static foo() { return false; }
}
module M {
    export var n: boolean;
}

var objA = new A();

// boolean type var
var ResultIsNumber1 = +BOOLEAN;

// boolean type literal
var ResultIsNumber2 = +true;
var ResultIsNumber3 = +{ x: true, y: false };

// boolean type expressions
var ResultIsNumber4 = +objA.a;
var ResultIsNumber5 = +M.n;
var ResultIsNumber6 = +foo();
var ResultIsNumber7 = +A.foo();

// miss assignment operators
+true;
+BOOLEAN;
+foo();
+true, false;
+objA.a;
+M.n;